1、語法專項課件（現在完成時2）初中英語仁愛版九年級上冊現在完成時三大用法現在完成時三大用法：1.表示到現在為止已經完成或剛剛完成的動作。2.一件發生在過去的事情對現在產生影響。3.一個動作開始于過去，并持續到現在（也許還將持續下去）。現在完成時結構回顧肯定句：主語 + have/ has + 過去分詞+.否定句:主語+havent ( have not) +過去分詞 主語+hasnt ( has not ) +過去分詞.疑問句:Have / Has+主語+過去分詞.?I havent finished my homework. Have you finished your homework? I

2、 have finished my homework. 結構already一般用于肯定句，意為“已經”，句中句末均可yet一般用于否定句和疑問句，意為“已經” ，句中句末均可Tom has already finished his homework.Tom hasnt finished his homework yet.易錯點1現在完成時常見標志詞辨析易錯點1現在完成時常見標志詞辨析ever用于疑問句，意為“曾經”，位于句中never含否定意義，意為“從不”，位于句中Have you ever eaten fish?I have never eaten fish.易錯點1現在完成時常見標志詞辨

3、析just多用于肯定句，意為“剛剛”，位于句中before用于所有句式，意為“之前”，位于句末I have just had my lunch.She hasnt seen you before.易錯點2since/for用法辨析since+時間點since+ 時間段+ agosince+ 從句（一般過去時）John has been a football player since 3 years ago.Hehaslived in China since 1992.sinceTom has lived in America since he was a little child.易錯點2si

4、nce/for用法辨析for+ 時間段forHe has kept the book for 2 weeks.易錯點3have been to/have gone to辨析have been tohave gone to去過某地已經回來，可用于任何人稱。常與once, twice, three times, ever, never 等連用。去某地了，說話時某人不在現場，常用于第三人稱。易錯點3have been to/have gone to辨析I have been to Beijing for three times.My father has gone to Shanghai for a

5、 meeting.（去了尚未回來）（去過已回來）【典例1】用since/for填空1. My aunt has lived in Australia_15 days.2. Margaret is in her office. She has been there_7 oclock.3. India has been an independent country_1974.考查現在完成時標志詞。題1中，15 days為時間段，選用for。題2、3中， 7 oclock和1974為時間點，選用since。forsincesince【典例2】My parents _Nanjing twice. A.

6、 have gone to B. have been to C. have been in D. are in 考查現在完成時。句意：我父母去過南京兩次。have gone to去了尚未回來；have been to去過已經回來，鎖定題眼twice，只能選擇答案B。【典例3】I havent decided when to visit my grandpa _. A. neverB. still C. already D. yet考查現在完成時標志詞。句意：我還沒有決定什么時候去看我爺爺。never，still僅用于句中，already用于肯定句，yet用于否定句、疑問句，故答案選D。【典例4】Has he _ been to Shanghai? A. already B. yet C. ever D. still考查現在完成時標志詞。句意：他曾去過上海嗎？由題目可知為現在完成時。根據句意“曾經”，選用ever。【典例5】Have you met